Year: 2017
Type: article
Abstract: Development of thermoelectric materials based on iron-sulfide minerals is reviewed with focusing on n-type doped CuFeS2. It is found that the thermoelectric properties of Zn-doped CuFeS2 strongly depend on the synthesis method, especially on the cooling rate and heat treatment conditions after spark-plasma sintering (SPS). A high power factor exceeding 1 mW/K2m is achieved around room temperature for samples annealed and slowly cooled after SPS. With aiming at reducing thermal conductivity, several methods are applied including the high-pressure torsion technique and nano-structuring by ball milling. These experiments successfully yield reduced thermal conductivity, though experimental conditions needs to be optimized to reduce electrical resistivity simultaneously.
DOI: 10.2497/jjspm.64.173
Authors: Naohito TSUJII, Takao MORI
Institution: National Institute for Materials Science
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W2609266370